/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraParameterDefinitionsSubscriber.h
void SubscribeToParameterDefinitions ( [UNiagaraParameterDefinitionsBase](API\Plugins\Niagara\UNiagaraParameterDefinitionsBase) * NewParameterDefinitions, bool bDoNotAssertIfAlreadySubscribed )